Because glutathione levels decline as you age, and glycine can help slow the glutathione slide, it's a good idea to keep your levels high by eating protein rich foods, like organic poultry, grass fed Benefits of Glutathione Helps Detox Your Liver And Muc Water for Health Glutathione Benefits for Gut Health Nikki Yelton RD Application Notes and Protocols for Measuring Glutathione Levels in Metadoxine Treated Cells